Beverage container cap



FIG. 1 is a top, side and front perspective view of a beverage container cap showing the new design;

FIG. 2 is a front elevation view thereof, the rear elevation being identical;

FIG. 3 is a right side elevation view thereof, the left side elevation being identical;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a beverage container cap, as shown and described. 